用opencv處理視頻時的一個基本格式

用opencv處理視頻時的一個基本格式
用了好久的opencv,寫過很多程序,今天偶然看了一個很基本的例子,才發現原來這裏也有金子。這段代碼寫的很完美。
int main(int argc, char** argv)
{
    IplImage* motion = 0;
    CvCapture* capture = 0;
        capture = cvCaptureFromAVI( "videoraw2.avi" ); 

   if( capture )
    {
        cvNamedWindow( "Motion", 1 );
        for(;;)
        {
            IplImage* image;
            if( !cvGrabFrame( capture ))
                break;
            image = cvRetrieveFrame( capture );

            if( image )
            {
                if( !motion )
                {
motion = cvCreateImage( cvSize(image->width,image->height), 8, 3 );
                    cvZero( motion );
                    motion->origin = image->origin;
                }
            }

          update_mhi( image, motion, 60 );
            cvShowImage( "Motion", motion );

            if( cvWaitKey(10) >= 0 )
                break;
        }
        cvReleaseCapture( &capture );
        cvDestroyWindow( "Motion" );
    }

    return 0;
}